Boiler.



PATENTED DEC. 12, 1905. J. MILNE.

BOILER.

APPLICATION FILED JAN. 23. 1905.

INVENTOR Q aww w @MM ATTORNEY,

UNITED STATES PATENT oFFIoE.

Specification of Letters Patent.

Patented Dec. 12, 1905.

Application filed January 23, 1905. Serial No. 242.374.

To all whom it may concern.-

Be it known that 1, JOHN MILNE, a citizen of the United States, and a resident of the borough of Brooklyn, in the county of Kings and State of New York, have invented cer tain new and useful Improvements in Boilers, of which the following is a specification.

This invention relates to a steam-boiler,

and its organization comprises a pair of drums connected by tubes, all of which are inclosed in a suitable chamber fitted with a furnace. what I term a feed-chamber the interior of which is isolated from the remainder of said drum and into which the ends of some of the boiler-tubes project, as well as the feedpipe for the boiler. A main steam-outlet is connected with one of the drums, or a number of outlet-pipes may extend from the said drum, the ends of the said outlet-pipes being connected to a manifold, from which latter an outlet extends, or the drum may be fitted up with both the said main steam-outlet and said outlet-pipes with the manifold.- The disposition of the tubes is such that they are grouped in nests of one or a plurality of rows. The nests of tubes are sufliciently separated to allow them to be easily cleaned and replaced by virtue of openings covered with doors in the chambers.

Figure .1 represents a vertical section through the center of the boiler. Fig. 2 shows a partial section on the line 00 00 of Fig. 1 and also on the line 00 :13 of the same figure. Fig. 3 is an enlarged partial view of the feedchamber looking in the direction of the arrow shown in Fig. 1. Fig. 4is,a section of Fig. 3 on the line 11: x Fig. 5 shows a modified form of feed-chamber in section.

The boiler is shown to comprise the upper or steam drum A, the lower drum B, the cen tral nest of tubes C, and the outer nests of tubes D and E. A main chamber F incloses the said elements, and the said main chamber is -divided into secondary chambers F F I F F by means of the partitions D and E.

Doors 0 cover openings 0 in the walls lead ing to the secondary chambers, and door 0 covers opening 0 in the lower portion thereof. A combustion-chamber G is connected with the main chamber F, and the former is shown with the grates H, furnace-door I ash-pit J, and its door J.

In the lower drum B there is secured with One of the said drums containslatter being held in place withthe bolts K One or more rows of tubes 6 of the nest E eX- I tends into the feed-chamber K, and the upper ends of the said. tubes are connected with the upper drum A. A feed-pipe L leads to the interior of the said feedchamber. A manhole with cover A is fitted up with the drum A, and a manhole with the cover B is fitted to the drum B. The partition D eX- tends up from the lower drum B behind the nest of tubes D, and the partition E extends from the upper drum A in front of the tubes The partition D contains perforations d and the partition E contains perforations e. The said perforations decrease in diameter or area from the lower to the upper ends of said partitions for the purpose of equalizing the heating efiect of the flames and gases, on the entire lengths of the tubes of the boiler.

The upper drum A has the steam-outlet A with the valve A and the outlet-pipes Z, which are connected with the manifold L. The said pipes Z enter the drum at a level of about its longitudinal axis, and at the ends of the pipes Z there are connected the extensions 1, that are pitched upwardly, securing the ends of the latter well up above the waterlevel in the drum A. A pipe Z with the Valve Z connects the upper drum A below the water-line with the manifold L outside of the main chamber F, and from the latter extends the outlet L The lower drum B is supported on bolsters- B, and a blow-off pipe is shown at B When the steam-boiler is in operation, the products of combustion on leaving the combustion chamber take the general course indicated by the arrows, first rising in and about the nest of tubes D in the secondary chamber F, then descending downward around and about the central nest of tubes 0 in the secondary chambers F F then rising again about and around the nest of tubes E v in the secondary chamber F to the outletopening F leading to a stack or smoke connection. While the main portion of the flame and products of combustion are taking the said described course a portion thereof goes directly from the combustion-chamber G to the outlet F through the holes or perforations in the partitions D and E, thereby equalizing the heating effects on the tubes.

The feed-water injected through the pipe L enters the isolated feed-chamber K, ascends through the row of tubes 6 into the upper drum A, and thus the feed-water is brought in contact with the escaping gases, thereby extracting the maximum amount of heat from the said gases and securing a high efficiency for the boiler. The oflice of the piping 1 is to flood the pipes Z with Water previous to the generation of steam to prevent them burning, and this is accomplished by opening the valve Z and allowing the water from the drum A to enter the said row of tubes Z and manifold L.

Various changes may be made in the details of the invention without departing from the spirit of the same. The feed-chamber may be connected with either drum and on the outside in place of the inside thereof. The said feedchamber may be located at the end of either drum, and it may be connected up with a boiler having more than two drums. The partitions may be located so that the gases and products of combustion instead of flowing in vertical courses may be directed to flow in horizontal courses.

The feed-chamb er may consist of a cap M, as shown in Fig. 5, which may be directly bolted to one of the drums by means of studs m.

Having described my invention, I claim 1. In a boiler the combination of a drum, a chamber connected with said drum and the interior thereof isolated from the drum, a removable bonnet bolted to the chamber, a second drum, tubes connecting the chamber with the second drum, and other tubes con necting the drums.

2. In a boiler the combination of a drum, a cover over a manhole on said drum, a chamber bolted to the drum, a removable bonnet bolted to the chamber, the interior of the chamber isolated from the drum, a second drum, tubes connecting the interior of the chamber with the interior of the second drum, and a cover over a manhole in the second drum, and other tubes connecting the drums.

3. In a boiler the combination of a drum, a manhole with cover on said drum, a feedchamber connected with said drum having its interior isolated therefrom, a bonnet bolted to said chamber, tubes connecting said feed-chamber with another drum, other tubes connecting the drums, and a cover over a manhole on the second drum.

4. In a boiler the combination of a pair of drums, walls connected with one of the drums to form a feedchamber' with its interior isolated from the drum, a removable bonnet bolted to said feed-chamber, a nest of tubes connecting the feed-chamber with the drum distant therefrom, other nests of tubes connecting the drums, each nest comprising a plurality of rows of tubes, the nests separated from one another to form a space between each pair of nests, a main chamber inclosing the said elements, a furnace connected with said main chamber, and doors over openings in said main chamber adjacent to the spaces between the nests of tubes.

5. In a boiler the combination of a pair of drums, walls extending from the interior surface of one of the drums to form a feedchamber with its interior isolated from the interior of the drum in which it is contained, a removable bonnet bolted to said walls, tubes connecting the feed-chamber with one of said drums distant therefrom, other tubes connecting the drums, a main chamber inclosing the said elements, a furnace connected with said main chamber, a steam-outlet connected with one of the drums, and partitions between some of the tubes.

6. In a boiler the combination of a pair of drums, nests of tubes connecting the drums, the nests separated from one another, partitions having perforations separating the nests, a main chamber inclosing the said elements, and a furnace connected with said chamber.

7. In a boiler the combination of a pair of drums, a feed-chamber connected with one of said drums, tubes connecting the feedchamber with the drum distant therefrom, other tubes connecting the drums, a main chamber inclosing the said elements, steamoutlet pipes extending from one of the said drums above the water-line therein, and extending through the main chamber.

8. In a two-drum boiler the combination of a pair of drums, tubes connectin the drums, a main chamber inclosing sai elements, a furnace connected with the main chamber, a steam-outlet connected with one of the drums, walls extending from one of the drums to form a feed-chamber, a bonnet bolted to the said walls, tubes connecting the said feed-chamber with the drum distant therefrom, and partitions between some of the tubes.

9. In a boiler the combination of a pair of drums, tubes connecting the drums, a main chamber inclosing the said elements, doors covering openings in said chamber, a furnace connected with the said chamber, a steam outlet connected with one of the drumsoutside of the said chamber, and other steamoutlet pipes connected with the same drum and passing through the said chamber.

10. In a boiler the combination of a pair of drums, tubes connecting the drums, a main chamber inclosing the said elements, doors covering openings in said chamber, a furnace connected with the said chamber, a steamoutlet connected with one of the drums outside of said chamber, other outlet-pipes connected with the same drum and passing through the said main chamber, a manifold connected to the outer ends of the outletpipes passing through the main chamber,

manifold and running outside of said main chamber, a valve in the latter piping.

11. In a boiler the combination of a drum,-

a feed-chamber connected with the drum, a feed-injection pipe leading to the feed-chamber, the interior of said feed-chamber isolated from the drum, a second drum, tubes connecting the feed-chamber and the second drum,- other tubes connecting the drums, a main chamber inclosing the said elements, doors covering openings in the main chamber, a furnace connected with the main chamber, an-outlet for steam connected with one of the drums outside of the said main chamber, and other outlet-pipes connected with the latter drum and passing through the said main chamber.

12. In a boiler the combination of a drum, a feed-chamber connected with the drum, a feed-injection pipe leading to the feed-chamber, the interior of said feed-chamber isolated from the drum, a second drum, tubes connecting the feed-chamber and the second drum, other tubes connecting the drums, a main chamber inclosing the said elements, doors covering openings in the main chamber, a furnace connected with the main chamber, an outlet for steam connected with one of the drums outside of the said chamber, other outlet-pipes connected with the latter drum and passin through the said main chamber, a mani old connecting the outer ends of the said outlet-pipes outside of the main chamber, steam-outlet piping connected to the manifold, a flooding-pipe connecting the drum having the steam-outlet ipe With the manifold, said flooding-pipe lccated outside of the main chamber, and a valve connected up with the flooding-pipe.

13; In a boiler the combination of an upper and a lower drum, walls extending from the interior of one of the drums to form a feed-chamber with its interior isolated from the interior of the drum in which it is located, a bonnet bolted to said walls, 'an injectionpipe connected to the feed-chamber, tubes connecting the feed-chamber with the drum distant therefrom, other tubes connecting the drums, a blow-off pipe connected with the lower drum, and a steam-outlet pipe connected with the upper drum.

14. In a boiler the combination of an upper drum and a lower drum, a feed-chamber connected with the lower drum, the interior of the feed-chamber isolated from the said lower drum, a feed-injection pipe leading to the feed-chamber, tubes connecting the feedchamber and the upper drum, other tubes connecting the drums, a main chamber inclosing the said elements, doors covering openings leading into the main chamber, a furnace connected to the main chamber, a steam-outlet extending from the upper drum outside of the main chamber, other steamoutlet pipes leading from the upper drum and passing through the main chamber, a manifold connecting the latter steam-outlet pipes, a steam-outlet pipe extending from the manifold, afiooding-pipe connecting the upper drum with the manifold and runningv outside of the chamber, and a valve in the latter pipe.

15. In a boiler the combination of an upper drum and a lower drum, a feed chamber connected with one of the drums, the interior of the said chamber isolated from the drum with which it is connected, tubes connecting the feed-chamber with the drum distant from the feed-chamber, other tubes connecting the drums, a main chamber inclosing the said elements, artitions in the main chamber having per orations, dividing the main chamber into secondary chambers.

16. In a boiler the combination of an upper drum and a lower drum, a feed-chamber connected with one of the drums, the interior of the said chamberisolated from the drum with which it is connected, tubes connecting the feed-chamber with the drumdistant from the feed-chamber, other tubes connecting the drums, a main chamber inclosing the said elements, partitions in the main chamber having perforations which increase in area from one end of each partition to the other, and the said partitions dividing the main chamber into secondary chambers.

17. In a two-drum steam-boiler the combination of an upper drum and a lower drum, a feed-chamber on the interior of the lower drum, and the interior of said feed-chamber isolated from the lower drum, a removable bonnet on the said feed-chamber, a feed-pipe leading to the feed-chamber, a blow-ofi pipe connected with the lower drum, a main chamber inclosing the said elements, doors covering openings leading into the main chamber, partitions between the tubes dividing the main chamber in secondary chambers, so as to direct the course of the flame and gases of the boiler, a combustion-chamber connected with the main chamber, grates .in the combustion-chamber, doors over openings leading to the combustion-chamber, an ash-pit under the grates, a door over an opening leading to said ash-pit, a steam-outlet pipe leading from the upper drum outside of the main chamber, other steam-outlet pipes leading from the upper drum through the main chamber, a manifold connecting the ends of the latter outlet-pipes outside of the IIO main chamber, an outlet-pipe connected to the said manifold, a flooding pipe connecting the upper drum with the said manifold, a

valve in the flooding-pi e, and a manhole in each of the drums of the boiler, tubes connecting the feed-chamber with the upper drum, other tubes connecting the drums.

18. In a boiler the combination of inclosing walls forminga main chamber, the latter having an opening ior the spent products of combustion, a combustion-chamber connect-.

ed and opening into said main chamber, grates in the combustion-chamber, the combustion-chamber having openings in its walls for a fuel-supply, an upper and a lower drum connected by separate nests of tubes inclosed in said main chamber, a plurality of rows of tubes forming each nest, each of said nests of tubes separated from the others, so

as to form a space between each pair of nests, doors covering openings leading into the said main chamber adjacent to the said spaces, a

feed-chamber in one of the drums, the interior of which is isolated from the interior of the drum into which it is placed, a nest of tubes connecting said feed-chamber and the other drum, a feed-pipe connecting with the lower drum, a bonnet bolted to said walls, a

feed-pipe leading to the feed-chamber, tubes connecting the feed-chamber with the upper drum, other tubes connecting the drums, a main chamber inclosing the said elements, doors over openings leading into the main chamber, partitions between the tubes dividing the main chamber in secondary chambers, so as to direct the courses of the flames and gases of the boiler, a combustion-chamber connected with the main chamber and a steam-outlet pipe leading from the upper drum.

20. In a boiler the combination ofan upper and a lower drum, walls extending from the interior of one of the drums to form a feed-chamber, a bonnet bolted to the feedchamber, tubes connecting the feed-chamber with the drum distant therefrom, other tubes connecting the drums, a main chamber in closing the said elements, and partitions in the main chamber dividing it into secondary chambers.

Signed at New York, in the county of New York and State of New York, this 21st day of January, A. D. 1905.

- JOHN MILNE. Witnesses:

ALEXANDER J. PEET, O. O'r'ro. 

